Loading vulnerability…
CVE-2018-4248 is an out-of-bounds read vulnerability affecting Apple operating systems, including iOS versions prior to 11.4.1, macOS High Sierra prior to 10.13.6, tvOS prior to 11.4.1, and watchOS prior to 4.3.2. The vulnerability was caused by insufficient input validation, which could allow an attacker to read memory outside the intended bounds.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a proof-of-concept exploit (xpc-string-leak.c) for CVE-2018-4248, an out-of-bounds memory read vulnerability in Apple's libxpc on macOS 10.13.5 and iOS 11.4. The exploit targets the diagnosticd process, an unsandboxed root service, by sending a specially crafted XPC message that causes diagnosticd to serialize and return out-of-bounds heap memory. The exploit is implemented in C and is built using the provided Makefile. The README.md provides detailed background on the vulnerability, exploitation strategy, and usage instructions. The exploit demonstrates a heartbleed-style attack, leaking heap memory from a privileged process, which could aid in further exploitation. The main entry point is xpc-string-leak.c, which connects to diagnosticd, sends the malicious message, and prints the leaked memory. No network endpoints or IP addresses are hardcoded; the attack vector is local inter-process communication via XPC.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
No public activity tracked yet. Mallory keeps watching.
No public activity observed for this vulnerability.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.